squeekboard does not show in terminal Spanish chars

I added an additional Spanish language to the input methods and now the keyboard in the terminal does not have anymore this key labeled with áÁ (the 2nd key counted from the left in the lowest row of key) which serves to add a Spanish tilded character. It is there when the keyboard works, for example, for the browser, but not for the terminal.

How one could get this key back again in the terminal?

Btw: In this Spanish keyboard at least the following chars are missing: ñ Ñ ¿